It does feel good to tackle these issues ourselves instead of spending hard earned money for someone else to do it for us. With this under your belt it will be no time before you are doing the timming belts...

My Tach is not working and it is not actually connect to the tach. The bike runs well (GL1100A 83') but the tach cable does not even turn. How do I know if it needs to be replaced and to where. This is my first bike ever, so I am a noob but take instruction well.

If the cable is not connected at both ends then the cable should spin. If you have attached to the gears on one end you will not be able to turn the cable by hand. If it is hooked up to the gears start the bike and see if the cable is spinning. If the cable is not spinning then most likely the cable is bad. Your best bet would be to buy a new cable they are only like 15-20 bucks I think and then you will know you have a good cable.